My first period date was 4th june. I always get periods +-2 days. I had sex on 12th and took ipill on 13th, under 24 hrs, no vomit, no nausea or other side effects. On 20th june withdrawal bleeding started, its light bleeding but the pain and cramps is the same as periods. What other symptoms should I expect if this is how my body reacts to ipill and when can I expect my periods next?